ProgressBarRef

public struct ProgressBarRef : ProgressBarProtocol, GWeakCapturing

GtkProgressBar is typically used to display the progress of a long running operation.

It provides a visual clue that processing is underway. GtkProgressBar can be used in two different modes: percentage mode and activity mode.

An example GtkProgressBar

When an application can determine how much work needs to take place (e.g. read a fixed number of bytes from a file) and can monitor its progress, it can use the GtkProgressBar in percentage mode and the user sees a growing bar indicating the percentage of the work that has been completed. In this mode, the application is required to call [methodGtk.ProgressBar.set_fraction] periodically to update the progress bar.

When an application has no accurate way of knowing the amount of work to do, it can use the GtkProgressBar in activity mode, which shows activity by a block moving back and forth within the progress area. In this mode, the application is required to call [methodGtk.ProgressBar.pulse] periodically to update the progress bar.

There is quite a bit of flexibility provided to control the appearance of the GtkProgressBar. Functions are provided to control the orientation of the bar, optional text can be displayed along with the bar, and the step size used in activity mode can be set.

CSS nodes

progressbar[.osd]
├── [text]
╰── trough[.empty][.full]
    ╰── progress[.pulse]

GtkProgressBar has a main CSS node with name progressbar and subnodes with names text and trough, of which the latter has a subnode named progress. The text subnode is only present if text is shown. The progress subnode has the style class .pulse when in activity mode. It gets the style classes .left, .right, .top or .bottom added when the progress ‘touches’ the corresponding end of the GtkProgressBar. The .osd class on the progressbar node is for use in overlays like the one Epiphany has for page loading progress.

Accessibility

GtkProgressBar uses the GTK_ACCESSIBLE_ROLE_PROGRESS_BAR role.

The ProgressBarRef type acts as a lightweight Swift reference to an underlying GtkProgressBar instance. It exposes methods that can operate on this data type through ProgressBarProtocol conformance. Use ProgressBarRef only as an unowned reference to an existing GtkProgressBar instance.

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  • ptr 
    Untyped pointer to the underlying `GtkProgressBar` instance.

    For type-safe access, use the generated, typed pointer progress_bar_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
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ProgressBar Class

  • Designated initialiser from the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafeMutablePointer<GtkProgressBar>)
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  • Designated initialiser from a constant pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafePointer<GtkProgressBar>)
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  • Conditional initialiser from an optional pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafeMutablePointer<GtkProgressBar>?)
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  • Conditional initialiser from an optional, non-mutable pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafePointer<GtkProgressBar>?)
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  • Conditional initialiser from an optional gpointer

    Declaration

    Swift

    @inlinable
init!(gpointer g: gpointer?)
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  • Conditional initialiser from an optional, non-mutable gconstpointer

    Declaration

    Swift

    @inlinable
init!(gconstpointer g: gconstpointer?)
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  • Reference intialiser for a related type that implements ProgressBarProtocol

    Declaration

    Swift

    @inlinable
init<T>(_ other: T) where T : ProgressBarProtocol
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  • This factory is syntactic sugar for setting weak pointers wrapped in GWeak<T>

    Declaration

    Swift

    @inlinable
static func unowned<T>(_ other: T) -> ProgressBarRef where T : ProgressBarProtocol
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ProgressBarProtocol.

    Declaration

    Swift

    @inlinable
init<T>(cPointer: UnsafeMutablePointer<T>)
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  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ProgressBarProtocol.

    Declaration

    Swift

    @inlinable
init<T>(constPointer: UnsafePointer<T>)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ProgressBarProtocol.

    Declaration

    Swift

    @inlinable
init(mutating raw: UnsafeRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ProgressBarProtocol.

    Declaration

    Swift

    @inlinable
init(raw: UnsafeMutableRawPointer)
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  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to ProgressBarProtocol.

    Declaration

    Swift

    @inlinable
init(opaquePointer: OpaquePointer)
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  • Creates a new GtkProgressBar.

    Declaration

    Swift

    @inlinable
init()
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